Magnet switch



Aug. 14, 1928.

' c. H. HODGKINS MAGNET SWITCH Filed Jan. 22, 1924 WITNESSES:

ATTORNEY u 1-u'1 s1 s rATcs ATEN orr cai CHARLES H, nonexms, OFlPIT'lSIBUBGH, PENNSYLVANIA, nssm'non. 'ro wnsrmo- HOUSE & MANUFACTURING COMPANY, A CORPORATION OF PENNSYL- z I v l I p A LMAGNET swmcn.

Application filed January 22, 1924. Serial No. 687,721.

My'in'vention relates toapparatus for conand establish contact between-I the upper trolling electric circuits and it has particular swltch membersv 14; and 16, .Th lat h om-{j relation to electromagneticallf operable, bet 4, on? account, ofits construction and? switches or contactors for control ing motors location with respect' to the magnetic, circuit,

l and the like. Y -I isvery sensitive to magnetization and there An ob'ect'of my invention is'to provide a fore, is actuated to release the armature-6o substantial and inexpensive reversing switch before the latter'h'as a tendencyto operate, for motor 1 control systems particularly, lVhen a reversal of operation is required,

although its application is not limited there the upper magnet is tie-energized and m to. the lower magnet 11' is energized; The lower My invention will be'described in cornice latch member 5 is then attracted by the pole tion with-the accompanying drawing which] piece 11 and the armature is released from is a View in side elevation, with parts bI'OlIn its upper closed position with a snap action,

away for clearne'ss, of apparatuscmbodyingbeing projected by spring 18' towards its in my invention. lower closed. position, wherein contact mem- An armature 1, having a pai1-"of'1nag--ber 15 engage-s contact member 17. This netizable arms extending in opposite dirccmotion is completed by means of the lower tions, is mounted upon an operatingshaft 2, operating magnet 11, which maintains the p which is supportedupon pedestal t pe bearswitch in its proper operating position.

ings 3. The armature is normal y maln- When the lower magnet 11 is tie-energized,

tained'in its illustrated position bymeans the contact spring 19 actuates the armature of a pair of latching members 4 and 5, of to its intermediate position, where it substantially S-shape, whichare mounted again latched, as illustrated in'the-drawing; upon a common bearing 6 and are biased to A valuable feature of my invention re- 25 the illustrated positions by meansof a tensides in the fact that the switch is independ-f sion spring 7, the ends of which are respecent of the action of gravity'in-its operation tively attached to intermediate ortions of and maybe mounted in any desired position. the latching'members. These late gmem- Furthermore, the switch, is. notinfluenced bers are provided withntrigger, port ons 8 by motion imparted to it'by' outside infill-= so and 9 for engaging corresponding notches ences, such as the rolling of a ship'orsiicar in armature 1 torestrain movements thereof, riage of any type. I j 195 as hereinafter more fully set fortln I have illustrated my invention inia pre- Associated with the respective arms of the ferredform of sim lo and substantial de-f I armature 1 are a pair of operatmg'magnets sign, although n10 ifications therein will a5 10 and 11', which are mounted upon a suitnaturally occuritothose skilled in the art.

able base 12 of iron or other magnetic mate'- I claim as my invention i f I Y rial. and are supported upon an insulating 1. A reversing switch comprising' 'an ar.

panel 13. Two or more movable. contact mature, magnetic means comprising a pair" members 14 and 15 of usual type are mountof coils for actuating the armature in either 40 ed near the respective ends of the armature of two directions, means or latching said 1 and are designed to co-operate withcorarmature in an intermediate position, said res nding stationary contact members 16 latching means being disposed between said- 17. Suitable contact pressure is incoils and operative in directions correspond sured by means of compression sprlngs 18 ing to the armature movement, and means 5 and 19, acting between the central portion for restoring said armature to said position i of the armature 1 and the respective contact when said magnetic means is de-magnetized. "members 14 and 15. 2. A reversing switch comprising an ar- Assuming the armature 1 in its illustrated mature and magnetic means for actuating inoperative position, if the upper operatthe armature in either of two directions, 50 ing magnet 10 is energized, the latch member means for latching said armature in an in- 4 is first attracted into engagement with the termediate position, said latching means upper pole piece 20, against the action of comprising part of the active magnetic cirspring 7. The armature is, of course, si1nulcuit and being operative in directions corretaneously attracted and is now free to close sponding to the armature movement to become energized upon the energization of said magnetic means, and means for restoring said armature to said position when said magnetic means is demagnetized. q

3. A reversing switch comprising an armature and operating means for actuating the armature in either of two directions, means for latching said armature in an intermediate position, said latching means comprising part of the effective magnetic circuit of said operating means, means for impartinginitial movement from one operative'position of said armature to another and,

means comprising said operating means for completing said movement.

4. A reversing switch comprising an armature, a plurality of coils for effecting the operation of the armature oppositely, a plurality of latching members mounted on a single bearing for restraining said armature in an inoperative position, a single spring for biasing said latching members, and means comprising said coils for selectively overcoming said bias to release said armature for movement in adirection corresponding to the selective energization of said coils, and means for restoring said armature to its inoperative position.

5. A reversing switch comprising an armature having a pair of magnetizahie arms extending in opposite directions, a pedestaltype hearing therefor, a pair of S-shaped latching members mounted on a common bearing and supported on said pedestal hearing, a single tension spring connected between said members, a flange extending from said armature and having detents for engaging said latching members and means for si multaneouslv energizing said armature and the one or the other of said latching members. q

6. A reversible switch comprising an armature having a pair of magnetizable arms extending in opposite directions, a pedestaltype bearing therefor, a pair of latching members mounted on a common bearing and supported on said pedestal bearing, a single tension spring connected between said members, a flange extending from said armature and having dctcnts for engaging said latching members and means for simultaneously energizing said armature and the one or the other of said latching members.

In testimony whereof, I have hereunto subscribed my name this 15th day of January, 1924:.

CHARLES H. HODGKINS. 

